Geopolymerisation also known as alkali activation of aluminosilicate occurs when
mineral sources with high Al and Si content such as kaolin, blast furnace slag or fly ash are
exposed to high alkaline environments, thus producing two to three dimensional Si-O-Al structure
which exhibits both zeolitic and ceramic properties which is not typically present in traditional
cement materials such as ordinary Portland Cement (OPC). Kaolin based geopolymers, inorganic
polymers that are also alumino-silicate materials with impressive mechanical properties
such as excellent coating materialfor fire resistant, poor electric conductor, chemically unreactive
over a wide range of pH, non-abrasive, low energy consumption, poor permeability and emits
less CO2 which makes earth a better place. This paper is to review the progress made in kaolin
based geopolymers that are currently in growing demand of researchers to replace existing ecounfriendly
materials.
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